#include<stdio.h>
void  swap(int *p1,int  *p2)
{
	int t;
	t=*p1;
	*p1=*p2;
	*p2=t;
}

main()
{
	int a,b;
	printf("a,b=");
	scanf("%d%d",&a,&b);
	swap(&a,&b);
	printf("a=%d,b=%d\n",a,b);
}




